Three way fridge/freezer (1 Viewer)

[Millibobs]

Hi can anyone point me in the right direction please. I have a dometic fridge/freezer which I think is only working on gas . It should change automatically Any ideas on which part is likely to be broken and is it difficult to repair. Keep hearing about silly high prices for Dometic repairs so have kept putting off this problem.

 

[Roryboys Dad]

Will it work on EHU and engine battery if you set it manually?


Do you get a flashing light and/or a buzzer sound when it fails to work on EHU and engine battery?


Does your panel look anything like this -

 

[MikeD]

What's the model number? :thumb:

^{_{Subscribers  do not see these advertisements}}

 

[Millibobs]

Will it work on EHU and engine battery if you set it manually?


Do you get a flashing light and/or a buzzer sound when it fails to work on EHU and engine battery?


Does your panel look anything like this -

Hi no its totally different model no.RM6505 135 L

 

[Millibobs]

What's the model number? :thumb:

Hi Mike it's RM6505 135L It has never lit up on the function light,but I've assumed it was working until recently when the fridge red light came on when I turned the gas off but had battery or engine running.

 

[Millibobs]

Hi can anyone point me in the right direction please. I have a dometic fridge/freezer which I think is only working on gas . It should change automatically Any ideas on which part is likely to be broken and is it difficult to repair. Keep hearing about silly high prices for Dometic repairs so have kept putting off this problem.

Still not got to the bottom of this problem ,can anyone be of assistance please
David

^{_{Subscribers  do not see these advertisements}}

 

[Hobbytwo]

Hi Millibobs,

A couple of questions :

Does the fridge work on EHU alone?
Does the fridge work on 12v engine running?
Can you access the rear of the fridge via the external vents?

 

[Millibobs]

Hi Millibobs,

A couple of questions :

Does the fridge work on EHU alone?
Does the fridge work on 12v engine running?
Can you access the rear of the fridge via the external vents?

Hi hobbytwo
Yes I can get to the back of the fridge via ext. vents not sure about the other questions which is why I asked the question. Think it's only working on gas.
Hope you can understand and help

 

[laneside]

It may be difficult if your control switch does not light up but there are four positions with subsequent pressings

i) 12 volt

ii) gas

iii) 230

iv) AES

If it just on gas that is all it will run on

if it is on 230 that is all it will run on

if it is on 12 volt that is all it will run on but only when the engine is running

if it is on AES it will run on 230 as priority when on hook up, 12 volt when driving and then should switch to gas about ten minutes after switching engine off.

May be difficult if the panel is not lighting up to know just where you are set

^{_{Subscribers  do not see these advertisements}}

 

[MikeD]

I suspect you have a manual. :thumb::thumb:


OPERATING INSTRUCTIONS
CONTROLS
FIG. 1
This refrigerator is equipped with an Automatic Energy
Selector (
AES
) which controls its operation and energy
supply.
The system selects the available energy source in the
order:
230-240 V - 12 V - LP gas
No manual operation is necessary for selecting the
energy source.
The control panel is shown in fig.1.
The refrigerator is set into operation by pushing button
(
A
) (main switch). The AES LED (
C
) lights green show-
ing: AES system working. Push- button (
B
) is used for
setting the electronic thermostat. The thermostat LEDs
(
D
) shows the chosen temperature position. When there
is a demand for refrigeration, AES will connect the most
favourable of the available energy sources.
Note:
12 V must always be available to supply the
electronics.
STARTING THE REFRIGERATOR
All references are to fig. 1.
LP Gas operation
AES will select LP gas operation under the
following
conditions:
•
No AC (230-240 V) available
•
Engine not running (no high current at 12 V DC
available)
•
AC available
but too low
•
Engine running
but DC supply too low
(condition three and four are briefly described in
item
Undervoltage operation
)
When the system chooses LP Gas operation, the flame
failure device is automatically opened, allowing the gas
to flow to the burner. At the same time, the electronic
igniter is energized.
After initial installation, servicing, or changing gas cylin-
ders etc., the gas pipes may contain some air that s
hould
be allowed to escape by briefly turning on the refrigerator
or other appliances. This will ensure that the flame lights
immediately.
If the flame goes out (by gust of wind etc.), the igniter is
immediately activated and reignites the gas.
Note:
The control electronics and the igniter must have
12 V DC supply to operate.
Gas trouble-shooting
If the AES LED (C) is flashing red, the system was not
able to start or continue gas operation. Set the switch
(A) to "OFF" and check that there is enough gas in the
gas bottle, that its valve is open and that any valves in
the gas line to the refrigerator are open.
Then push button (A) to "ON" again. After 10 sec. AES
will repeat the ignition sequence. When the AES LED
(C) again starts flashing red after 30 sec., the t
rouble
persists (air in the line, no gas?). Switch (A) briefly off
and then on again. It might be necessary to repeat this
operation 2-3 times if the tubing contains air (after
changing gas bottles, repairs etc.).
If this does not help, you should consult a service
technician.
230-240 V Operation
When a mains connection is available, AES will select
this. Please note, that even being in AC mode, 12 V DC
is necessary for the internal supply of the electronics.
12 V Operation
AES will select the 12 V mode of
operation only when
the vehicle engine is running (detected by the alternator
connection of the fridge D+).
SWITCHING BETWEEN ENERGY
SOURCES
When switching from one energy source to another,
there are some delays implemented in the AES system.
The 15 min.
delay between switching off the engine and
starting gas mode is intended to
delay the starting of gas
mode e.g. when stopping at a filling station.
WARNING: It is not allowed to have a naked
flame at a gas filling station. If you are not sure,
that your stop is shorter than 15 min., you are
advised to switch off the main switch (A), fig. 1,
when stopping at a filling station.
Undervoltage operation
The AES system is designed to guarantee the maximum
cooling efficiency under any circumstances. Therefore,
the system monitors continuously the voltage level while
being in either 12 V DC or 230-240 V AC mode. If the
voltage is too low, the system switches to Gas mode
shown by the yellow LED (E in fig. 1.). The system stays
in Gas mode, until the electrical supply voltage has
recovered to normal level.
IF THE REFRIGERATOR FAILS TO WORK
Check the following points before calling a service tech-
nician:
1. that the green AES LED goes on, when the switch
(A) is set to "ON" (12 V must be available).
2. when mains are connected but the refrigerator stays
in gas operation: Is the refrigerator correctly connec-
ted and is the fuse (230-240 V) intact?.
3. is the 12 V fuse intact?
4.
Disconnect the wall plug, and the 12 V wires
before servicing.
Check the fuses on the circuit
board, (under the black cover at the top of the refrig-
erator and behind the control panel).
Remove the two screws holding the control panel,
pull out the control panel with its electronics. Remove
the cover and check the fuses.
5. if the refrigerator does not operate in DC mode when
the engine is running:
Is the alternator (D+) connection made correctly?
6. if the AES LED (C) flashes red: see chapter
Gas trouble shooting

 

[Hobbytwo]

Right Millibobs, you've now got something to work on from MikeD !

These problems can only be solved by a process of elimination on the basis of what's functioning and what's not. After going through MikeD's list, let us know what's happening then. Note that apart from engine 12v running, the other energy sources must have 12v from you leisure battery before they'll "fire up."